Duplicating mechanism



IIHJ

.vnzzl d@ H. G. JOHNSTONE DUPLICATING MECHANISM Filed May l5, 1932 Dec. 1, 1936.

efe:

Dec. l, 1936 H, G JOHNSTONE 2,062,456

DUPLICATING MECHANI SM I Filed May 13, 1932 5 YSheets-Sheet 2 Dec. l, 1936. H, yQ JQHNSTONE 2,062,456

DUPLICATING MECHANISM Filed May l5, 1932 5 Sheets-Sheet 4 Dec. l, 1936. H. G, JoHNsToNE DUPLICATING MECHANISM 5 sweets-sheet 5 Filed May 13, 1932 mmm Tum NQN Patented Dec. 1, 1936 UNITED STATES PATENT OFFICE DUPLICATING MECHANI SM 4 Harold G. Johnstone, Chicago, Ill., assigner to Western Electric Company, Incorporated, New York, N. Y., a corporation of New York Application May 13, 1932, Serial No. 611,031

9 Claims. (Cl. 164-114) y f taken along the line 3-3 of Fig. 2 in the direc- This invention relates toduplicating mechanisms, and more particularly to pneumatically controlled mechanisms for duplicating statistical record cards.

vIt is an object of the present invention to provide a simple mechanism for rapidly dupli- `eating records.

In accordance with one embodiment, the invention contemplates the provision of a mecha- Vnism for perforating duplicates of a supply of record cards having various indicia therein, wherein tabulating cards to be duplicated are advanced under and engaged by a head connected to a source of compressed air and having cooperating therewith a block having a plurality of pistons therein, one for each possible perforation in the recordcard to be duplicated. After a card is moved into position beneath the head, air under pressure is supplied to the head and forced through the apertures in the card to be duplicated, to force downwardly the lpistons associated with those particular perforations. The pistons upon being forced downwardly will be locked in their downward position and will serve as abutments against which perforating pins may be lifted by a blank card supported on a die plate, so that those pistons which are locked in their downward position will cause their corresponding perforating pins to pass through the record card while those perforating pins associated with pistons not locked in their downward position will be lifted by the record card without perforating the card.

Mechanism is also provided for advancing the cards to the perforator pins and to the pneumatic head in predetermined timed relation so that a card which has been perforated'will be advanced from under the perforating pins dur- .ing that portion of the machine cycle wherein a "new card to be duplicated is controlling the setting up of the pistons.

These and other objects of the invention will be apparent from the following detailed description, when considered in connection with the accompanying drawings, wherein:

Fig. 1 is a side elevational View of a record card duplicating apparatus embodying the novel features of the invention;

Fig. 2 is an enlarged fragmentary vertical sectional View taken along the line 2-2 of Fig. 1 in the direction of the arrows, parts being broken away to show more clearly the details of construction;

Fig. 3 is a fragmentary vertical sectional view tion of the arrows; y

Figs. 4 and 5 are fragmentary horizontal sectional views taken along the lines 4 4 and 5--5 respecti-vely of Fig. 3 in the direction of the ar` rows;

Figs. `6 and '7 are fragmentary vertical sectional views taken along the lines 6 5 and 'I-'I respectively of Fig. 3 in the `direction of the arrows, and

Fig. 8 is a fragmentary vertical sectional view taken along the line 8--8 of Fig. 7 in the direction of the arrows.

Referring now to the 'drawings wherein like, reference numerals designate like parts throughout the several views, power fordriving the'vav rious movable parts of the mechanism is supplied from a motor (not shown) through a belt I (Figs. 2, 6 `and '7) which drives apulley II fixed to a `sleeve I2. rotatable upon a shaft I3, mounted in a manner to be described hereinafter. The sleeve I2 is held against lateral movement on the shaft I3 The sleeve I2 is freely" by collars I4 and I5 pinned to the shaft, andi,

has formed integrally therewith a worm gear I6" which meshes with a worm gear I'I xed to one end of a shaft I8 (Figs. 1, 6 and 7). Mounted upon the other end of the shaft I8` is a worm gear I9 (Fig. 1) which meshes with 4a worm gear v2l) fixed to a stud shaft'2 I 'carrying' a bevelv gear 22. Meshing with the bevel gear 22 is a bevel gear 32 mounted on one end of a shaft 33 which carries intermediate its ends a bevel gear 34 for driving a bevel gear 35 pinned toa shaft 36.

The shaft 36 carries bevel gears 3l, 38, 39'and 40 plurality of spring pressed upper card feed rollers 62 and 63 (Figs. 1, 2 and 3) which are not positively driven and which are normally urged downwardly into contact with the card feed rollers 6U. 'I'he upper card feed rollers 62 and 63 are of a known type and a detailed description thereof is not believedA to be necessary.

Pinned to the upper end of the shaft 33 (Fig. 1) is a beveled gear 64 meshing with a beveled gear 65 secured to a shaft 66 suitably journaled on one of the side plates 49 and carrying beveled gears 61, 63, 99 and 10. Meshing with the beveled gears 61, 68, 99 and 10 are beveled gears 1|, 12, 13 and 14, respectively, mounted upon shafts 15, 16, 11 and 18, respectively. The shafts 15 and 18 are journaled in the side plates 49 and extend through the entire machine, whereas the shafts 15 and 11 are stud shafts and extend only a short distance beyond the inner side of one of the side plates 49 (Fig. 1). Carried by the shafts 15 and 10 are a plurality of enlarged card engaging portions 99 similar to the card feed rollers 60 of the shafts 45 and 48 for engaging a card to be duplicated. The shafts 10 and 11 carry adjacent the inner sides of the side plate 49, card feed rollers 9| for cooperating with the enlarged portions 90 of the shafts 15 and 16 to advance a card to be duplicated through the machine from a magazine 92 to a receptacle 93 (Fig. 1). The shaft 18 carries at its right end (Fig. 2) a beveled gear 94 which meshes with a beveled gear 95 mounted upon a shaft 96 extending along the right hand side plate 49 (Fig. 2) for driving stud shafts similar to the stud shafts 19 and 11 on the right hand side of the machine (Fig. 2). Cooperating with the card engaging portions 90 and 9| of the shafts 15, 16, 11 and 18, are a plurality of spring pressed upper card feed rollers 91 and 98 similar to the card feed rollers 62 and 53, respectively, and serving the same purpose as the card feed rollers 63.

After the motor is started the card feed rollers will be driven continuously and will tend to advance cards fed thereto from the magazines 6| and 92 to their respective receptacles 59 and 93.

The magazine 6| which is adapted to receive a supply of blank cards 99 to be perforated as duplicates of a supply of perforated cards |90 in the magazine 92, is provided with a card feeding iinger |9| slidably mounted in the bottom thereof. Extending downwardly from the base of the card feeding finger is a lug |02 having pivoted thereto one end of a link |03 the other end of which is pivoted to a bell crank |94 pivoted on a shaft |05. The bell crank |94 has mounted upon one end thereof a cam roller |96 which extends into a cam groove |91 in a cam |98 (Fig. 1).

A card feeding nger |09 (Fig. 1) is slidably mounted on the bottom of the magazine 92 and is provided with downwardly and outwardly extending lugs I0 which extend through slots ||5 in the side plates 49 and are interconnected with the upper ends of a bifurcated bell crank Ill by links ||2. The bell crank is pinned at ||3 to the shaft |95 and has a cam roller |4 mounted in a cam groove I6 of cam |98. The card feed fingers |0'| and |99 have card engaging portions |26` and |21, respectively, for engaging the bottom cards in their respective magazines to advance them through card slots |29 and |29, respectively, and into engagement with the card feed rollers driven by the shafts 48 and 18, respectively. Due to the fact that the cam rollers |06 and |4 are actuated by the same cam at different times in each cycle of rotation of the cam, in the direction of the arrow (Fig. l) a card from the supply of cards |00 will be advanced to its associated card feed rollers at a predetermined time inthe cycle of rotation of the cam and shortly thereafter a card from the supply of cards 99 will be advanced to its associated card feed rollers to advance the cards through the machine in echelon formation; that is, the card from the supply |09 will be slightly in advance of the card from the supply 99.

The cam |08 is mounted upon a shaft |30 journaled in brackets ||1 suspended from the base 50 and has secured thereto a gear |3| adapted to be driven by a train of gears indicated generally at |32 which in turn are driven by a gear |33 (Figs. 1 and 7) mounted upon the shaft I3 and adapted to be rotated thereby.

The shaft I3 is journaled in the side plates 49 and has pinned thereto a driven clutch member |34 (Figs. 2, 6 and '7). Cooperating with the driven clutch member |34 is a driving clutch member |35 which is slidable longitudinally of the shaft |3 andwhich is provided with horizontally extending arms |36 which are slidable in apertures |31 in the pulley Il. The driving clutch member |35 rotates with the pulley and is provided with a circumferentially extending groove |38 into which extend arms of a bifurcated lever |39 (Figs. 3, 6 and 7) pinned to a shaft |40 journaled upon the base 59 and normally urged to rotate in a counterclockwise direction (Figs. 6 and '7) by a coil spring |4| (Fig. 3) thereby to hold the driving clutch member |35 out of engagement with the driven clutch member |34. Also pinned to the shaft |49 is a vertically extending control lever |53 (Figs. 2, 3 and 7) which will normally be held in the position shown in Figs. 2 and '7 by the spring |4i, but which may be moved to the right (Figs. 2 and 7) to rock the shaft |40 in a clockwise direction and through the bifurcated lever |39 move the driving clutch member |35 into engagement with the driven clutch member |34. The lever |53 has cooperating therevvith'a. flexible rod commonly known as a Bowden wire |54 for moving it to the right (Fig 7). The Bowden wire |54 is enclosed in a casing |55 secured to a bracket. |56 mounted upon the base 59 and the Bowden wire may be operated by a suitable push button of any known type conveniently mounted for operation by an operator. The lever |53 upon being moved to the right (Fig. 7) will engage a latch member |51 pivoted to the side plate 49 at |60 and normally urged about its pivot in a counterclockwise direction and into engagement with a stop member |59 by a spring |58 to a position where it Will lock the driving clutch member |35 in engagement with the driven clutch member |34 due to the engagement of the end of the lever |53 With a stop IBI formed on the latch |51, thereby to cause the shaft I3 to rotate continuously until the latch |51 is released from the lever |53. A second Bowden wire mechanism indicated generally at |62 (Figs. 2, 3 and '1) and mounted upon the bracket |56 may be actuated to move the latch member |51 upwardly out of engagement with the lever |53 thereby to permit the spring |4| to return the lever |53 to its normal position as shown in Figs. 2 and 7 for moving the driving clutch member |35 out of engagement with the driven clutch member |34.

After a card has been withdrawn from the bottom of the magazine 92 the card feed rollers 90 and 9| tend to advance it through the machine and into the receptacle 93. However, the card in transit from the magazine 92 to the receptacle 93 will be engaged by a card stop |63 (Figs. 2 and 3) which will be interposed in the path of the card. The card stop |63 is attached to a pneumatic head |64 which is reciproca-bly mounted in the side plates 49 and which is adapted to be reciprocated by a pair of cams |65 mounted upon the shaft |3 and provided with cam grooves |66 in which travel cam rollers |61 mounted upon the lower ends of levers |68 and having their other-ends secured to the pneumatic head |64 at |69.

When a card is stopped under the pneumatic head |64 by the card stop |63, the head |64 will continue its downward movement to clamp the card under it and shortly after the card is clamped by the head a camming pin (Fig. 1) mounted upon one of the cams |65 will engage with and move a valve operating lever I 8| in a counterclockwise direction (Fig. l) to open avalve |82 and permit air under pressure from a source (not shown) to pass from a pipe |83 into a pipe |84 which is interconnected with the pneumatic head |64 by a pipe |85 and a ilexible connection |86. A blast of air under pressure will thus be delivered through a port |81 (Fig. 3) formed in the pneumatic head |64 and into the interior of the head. The upper surface of the pneumatic head is rounded and extends downwardly to a grid |88 which is sealed thereto and which is provided with 45 columns of apertures |89, there being 12 apertures 1n each column. These apertures |89 are so positioned as to be in direct vertical alignment with every possible hole position of a statistical card advanced from the supply of cards |03 when the card is stopped under the pneumatic head |64 by the card stop |63, the blast of air directed from the pipe |83 upon the opening of the valve |82 will be directed through the grid and through all of the holes in a card, a duplicate of which is to b-e made.

As the shaft I3 continues to rotate the camming pin |83 will engage an upwardly extending arm |90 (Fig. 1) of a reciprocable lever I 9| slidably mounted upon the base 50 by means of a bracket |94 and having an arm |92 thereof engaging a downwardly extending portion |93 of the valve operating lever I8I. When the camming pin |80 engages the arm |90 of the lever |9| it will move the lever |9| to the left (Fig. 1) thereby to rock the valve operating lever I8I in a clockwise direction (Fig. 1) to close the valve I 82 and shut oi the supply of air under pressure from the pipe |84.

In direct vertical alignment with the apertures |89 in the grid |88 (Figs. 2 and 3 are a plurality of cylinders 204 formed in a cylinder block 205 secured to the side plates 49 and slidably mounted in each cylinder is a piston -206 which has associated with it a coiled spring 201 for normally urging it upwardly. The coiled spring 201 for each piston 20B surrounds a reduced portion 208 of the piston and resiliently engages a shoulder 209 of the piston and the upper surface of a guide plate 2|0 mounted between the side plates 49.

The lower portion of each of the pistons 206 is slidable in an aperture 2| I, individual thereto and formed in the guide plate 2| 0 and is provided with a notch 2 I2, so that when a piston is moved downwardly it will be locked in its downward position due to the engagement of the notch 2I2 with a spring pressed latch plate 2I3 provided with a plurality of apertures 2| 4 corresponding in number to the number of pistons in a column. There is provided one latchplate 2|3 for each column of pistons and these plates are normally urged to the left (Fig. 3) by contractile springs 2 I 5 which normally tend to move the latch plates into engagement with a stop member 2I6 extending transversely to the direction of movement of the latch plates 2I3 and secured to the guide` plate 2|0. The stop member 2|6 prevents movement of the latch plates 2I3to the left (Fig. 3) beyond a predetermined point where a tapered edge 2|1 formed on each of the pistons 'mayengage one edge of its associated aperture 2I4 to cam the latch plate to the right (Fig. 3) until the plate engages in one or more of the notches 2I2 in its associated column depending on the number of pistons depressed in a particular column. Ifit is desired to leave-imperiorate any column of a duplicate statistical record card despite thefact that the record card being duplicated vhas perforations in that particular column, the latch plate 2I3 for that column may be latchedinits right hand position (Fig. 3) by vmeans of manually Settable stops 2|8 of which there is provided one for each latch plate. The stops 2| 8 when inoperative are in the position shown in full lines in Fig. 3 and may be moved manually to their operative position as shown in dotted lines.

The pistons 206, upon being actuated to move downwardly, will be latched in their downward position by the latch plates 253 except those in columns it is desired to avoid for a predetermined portion of the cycle of rotation of the shaft I3 to control perforating p-ins 233 (Figs. 2 and 3) of which there is provided one for each possible card hole in a statistical record card having 45 columns with 12 possible holes in each column. After the pistons 206 have controlled the operation of the perforating pins 230, as described hereinafter, the pistons will all be released simultaneously to permit their associated springs 201 to move them to their upper position as vshown in Figs. 2 and 3 clue to t-he movement of all the 49 and having pinned thereto a lever 235 (Fig. 8). The lever 235 carries at its lower end (Fig. 8')

Ya cam roller 236 which rides in a cam groove 231 formed in a cam 238 fixed to the shaft I3 so that once in each revolution of the shaft I3 the Shaft 234 will be oscillated to move all ofV the latch plates 2 I3 except those avoided to the right (Fig. 3) to release their associated pistons 206.

The perforating pins 236 are each provided with a headl 239, the lower edges of whichrest upon a guide plate 240 for normally supporting the pins 230 in the position shown in Figs. 2 and 3. The guide plate 240 hasl a plurality of apertures 24| in which the pins 230 are slidable and is supported between the side plates 49. A guide plate and die unit indicated generally by the numeral 250 `is recip-rocably mounted in the side plates 49 at 25| and comprises upper and lower guide plates 252 and 253, respectively, and a die plate 254 provided with apertures 255, 256 and 251, respectively, in which the perforating pins 230 may move and the guide plate 253 is spaced from the die plate 254 to permit '259, the other end of which is pivoted on the shaft 234 (Fig. 8). Intermediate the ends of the lever 259there is formed a downwardly extendy40 pinned to a shaft 234 journaled in the side plates ing portion 260 (Fig. 8) which carries a cam roller 26| mounted in a cam groove 262 of a cam 263 fixed to the shaft I3. The cam 263 will move the card stop 258 into the path of a card advanced from the magazine 6I to position the card under the perforating pins 230 and upon the die plate 254 for a short interval while the card is perforated. This short interval occurs immediately after the pistons 230 have been locked in their downward position.

While a card is held upon the die plate 254 by the card stop 253, the guide plate and die unit 250 will be reciprocated by a pair of actuating levers 264 secured thereto and having mounted upon their lower ends cam rollers 265 which eX- tend into cam grooves 266 formed in cams 261 mounted on the shaft I3 (Figs. 2, 3 and 7) Each time the cams 261 move the guide p-late and die unit 25|]V upwardly a card positioned on the die plate 254 will raise all the perforating pins 230 with it, except those pins which encounter the lower ends of pistons 206 which have been moved downwardly due to a blast of air being directed through the apertures in a card to be duplicated and striking the upper surface of the pistons. The pistons 206 which have been driven downwardly will be locked in their downward position and will cause their associated perforating pins 230 to perforate the card positioned upon the die plate 254 with a duplicate of the information contained in the last card to be engaged by the pneumatic head |64.

A better understanding of the invention will be had from the following brief description of the operation thereof.

Assume that a supply |09 ofstatistical record cards having information punched therein are positioned in the magazine 92 and a supply of blank statistical record cards 99 are positioned in the magazine 6|, and assume that it is desired to perforate a duplicate of each of the cards in the magazine 92. The motor (not shown) may be started to drive the pulley I0 thereby to drive all of the card feed rollers 60, and 9| continuously, and to rotate the driving clutch member |35, whereupon the feeding of cards from the magazines 6I and 92 may be started by actuating the Bowden wire |54 to move the lever |53 to the right (Fig. 2) and connect the driving clutch member |35 to the driven clutch member |34. In rotating, the clutch member |34 will carry with it the shaft I3, which drives all of the moving parts o-f the mechanism through their Vcycles of operation. Early in the cycleof rotation of the shaft I3, the gear |33 will drive the train of gears |32 to cause the cam |08 to rock the lever II| to the position shown in Fig. 1, thereby to engage the lowermost card of the supply I00 and advance it to the card feed rollers 90 and 91 which will in turn drive the card under 'the pneumatic head |64 which, as the card begins to move thereunder, is moved downwardly due to the downward movement of its levers |68 by the cams |65. The head |64, in moving downwardly, will move with it the card stop |63 so that a card advanced from the supply |00 will be stopped under the pneumatic head for a short time, and while held in that position the camming pin |60 will strike the valve operating lever I8I to permit a blast of air from the source (not shown) to be directed into the pneumatic head |64 and through any holes in the card posiytioned under the head for driving downwardly those pistons 206 associated with the perforations in the card held under the pneumatic head |64.

The pistons 206, in moving downwardly, will cam their associated latch plates 2I3 to the right (Fig. 3) against the tension of the springs 2I5 until the plates 2| 3 engage in the notches 2I2 formed in the lower ends of the pistons to lock the pistons in their downward position. Any piston in a column the latch plate 2I3 of which is locked in its right hand position by the manually settable stops 2| 8, will not be locked in its downward position but will be returned to the position shown in Figs. 2 and 3 by the springs 201, as soon as the air under pressure is disconnected from the pneumatic head |64 and the air under pressure is shut off from the pneumatic head |64 shortly after the valve |82 is opened due to the closing of the valve |82 by the moving of the valve operating lever clockwise (Fig. l) by the reciprocable lever I9I. Just after the air under pressure is disconnected from the pneumatic head |64 the head will start to move upwardly and will release the card held under it due to the removal of the card stop |63 from the path of the card and the card feed rollers 98, 91, 90 and 9| will advance the card to its hopper 93.

At approximately the same time that the head |64 begins to move upwardly, the card feeding nger I0! will be moved to the right by the cam |08 to feed a card from the supply 99 of blank cards into position upon a die plate 254, and as the card from the supply 99 moves into position upon the die plate, the card stop 259 will be moved upwardly into the path of the card and will stop it in position between the die plate 254 and the guide plate 253, and will hold the card in that position while the guide plate and die unit 250 is reciprocated by the cams 261 driving the levers 264 upwardly out of the position shown in Figs. 2 and 3 and subsequently back to that.

position. The guide plate and die unit 250, in moving upwardly, will cause the card positioned upon the die plate 254, to engage with all of the perforating pins 230 to carry the pins upwardly with the unit 250, thereby lifting the heads of the pins 239 off of the guide plate 240. All of those perforating pins 230 whoseA associated pistons 206 have not been locked in their downward position by the latch plates 2I3, will move upwardly with the card, but those perforating pins 230 whose associated pistons 206 have been locked in their downward position, will be held against upward movement and will, in cooperation with the die plate 254, perforate holes in the record card positioned on the die plate in those hole positions corresponding to the hole. positions perforated in the record card which just passed out from under the pneumatic head I 64. Shortly after the guide plate and die unit 250 returns to its normal position as shown in Figs. 2 and 3, the card stop 258 will be cammed out of the path of the card on the die plate 254, and the card feed rollers 60 will be permitted to advance the card into its receptacle 59.

Continued rotation of the shaft I3 will advance cards one at a time from the magazines 6I and 92 and will perforate the cards from the supply 99 as duplicates of those cards in the supply |00, each rotation of the shaft I3 causing the perforation of a duplicate card. It will be apparent from the description of operation thus far, that the cards from the supply |00 are advanced to the pneumatic head prior to the advancement of a card from the supply 99 to the guide plate and die unit 250, thereby reducing appreciably the ,length of time required to perforateduplicatesofthesupply o-f car'dsl. j L

The shaft |3 will continue to rotate and vwill feed cards from the magazines 92V and 6B' continuously until the motor (not shown) is stopped, or the driving and driven clutch members |35.

and |34, respectively, are disengaged dueto the actuation of the Bowden wire mechanism 162,1

to move the latch |l5`llo`ut of engagement with the lever |53, thereby to permit the spring to rock the lever |53 in a counterclockwise direction (Figs. 2 and 7).

Although this invention has been described as rela-ting to a specific card duplicating apparatus, it is to be understood that the invention has many other applications and should be limited only by the scope of the appended claims.

What is claimed is:

1. In a card duplicating apparatus, a reciprocable pneumatic head, a grid secured tothe bottom of said head and having apertures therein in alignment with all potential hole positions in a card to be duplicated, means for advancing a card to be duplicated to position under said head, means for lowering said head into engagement with said card to prevent the escape of air between the head and card, means for supplying air under pressure to said head, means controlled by the air passing through apertures in the card to be duplicated for setting up perforators to perforate a duplicate of said card, and means operable in timed relation to the operation of the pneumatic head, for causing the perforators to perforate the duplicate card.

2. In a perforating apparatus, a pneumatic head having a plurality of apertures therein for directing air under pressure through apertures representing infomation in a record member, said apertures in the head being in alignment with all potential hole positions in the record member to direct the air under pressure through holes in the card and the head engaging the card around each aperture to prevent air from getting under the card, means controlled by the air under pressure passing through the record for producing a duplicate of said information on a second record member, and means operable in timed relation to the operation of said duplicate producing means for moving said pneumatic head into engagement with said first mentioned record member to form an air tight seal between said member and the head.

3. A perforating apparatus comprising means for directing air under pressure through apertures representing information in a record member to take information from the record member including a reciprocable pneumatic head for engaging the record member to apply air under pressure to a surface thereof at spaced positions in alignment with each potential hole position in the record member, means for moving said pneumatic head into rm contact with the surface of the record member to prevent leakage of air between the surface. of the member engaged by the head, and means responsive to the air directed through the .record member and operable in timed relation to the operation of the pneumatic head for perforating a duplicate of said information in a second record member.

Il. A card duplicating apparatus comprising a pneumatic head for directing air under pressure through apertures in a card to be duplicated, a

grid secured to the bottom of said head and having apertures therethrough for every possible hole in the card to be duplicated, a block positioned beneath`v said head and having f cylindrical .openings in'alignmentwith the apertures in said grid, means for moving a card'into position between said: block .and said head, means for-moving the head into engagement with the card.` to bel duplicated to form an air tight seal between thecard and the head, a .card stop carriedbysaid head `to through a card, a plurality of perforating pins in y alignment with said pistons, a die plate cooperating with said pins and adapted to move a second card into engagement with said pins whereby all of said pins will be moved except those associated with pistons locked yin their operated position by said latch plates to perforate the information in those portions of the first mentioned reco-rd card associated with latch plates not locked in their inoperative position and means for reciprocating said die plate in timed relation to the operation of said pneumatic head.

5. In an apparatus for duplicating record sheets, sensing means including a pneumatic head" for directing air under pressure through perforations in a record sheet to be duplicated, a plurality of settable means actuatable bythe air under pressure in passing through the record to be duplicated for storing the information sensed, means controlled by said settable means for causing the sensed information to be perforated in a second record sheet, means for advancing sheets to be duplicated to the sensing means, and means for advancing sheets to be perforated to the perforating means while` the settable means are being actuated.

6. In a perforating apparatus, sensing means operable in response to apertures in a record card, perforating means for a duplicate record card, means for advancing and stopping a card under the sensing means, means for advancing and stopping a card under the perforating means, and means for causing said cards to be stopped in successive timed relation whereby one card may be perforated while another is being advanced to the sensing means.

7. In a card duplicating apparatus, means for sensing master record cards, settable members controlled by the sensing means for storing information received from the master card, selecting means independent of the master card for selectively determining which of the settable members shallv be effective to store information, and means controlled by the effective settable members for perforating a duplicate card after the sensed master card has been removed from the sensing means. i

8. In a card duplicating apparatus, sensing means operable in response to apertures in maslter record cards, means for storing information head and having openings in alignment with the apertures in the grid, perforating means in operative association with the openings in the block, means for positioning a master card to be duplicated between said block and the grid on said head, and means for admitting air under pressure into the pneumatic head to effect control of the perforating means to perforate a duplicate card in accordance With the master card. i

HAROLD G. JOHNSTONE. 

